package com.zp.collection;

import java.util.TreeSet;

public class TreeSetTest2 {
	public static void main(String[] args) {
		
		TreeSet<String> set = new TreeSet<String>();
		
		set.add("C");
		set.add("A");
		set.add("D");
		set.add("B");
		
		System.out.println(set);
		
	}
}
